CN113494485A

CN113494485A - Fan module and electronic device

Info

Publication number: CN113494485A
Application number: CN202010332407.XA
Authority: CN
Inventors: 杨期闳
Original assignee: Wistron Corp
Current assignee: Wistron Corp
Priority date: 2020-04-08
Filing date: 2020-04-24
Publication date: 2021-10-12
Anticipated expiration: 2040-04-24
Also published as: US11388838B2; TWI743732B; US20210321532A1; CN113494485B; TW202138689A

Abstract

The invention discloses a fan module and an electronic device. The blade mechanism comprises a frame, a positioning frame and a plurality of blades, wherein the positioning frame is movably connected with the frame, and the blades are movably connected with the positioning frame and the frame. The frame has a through hole. The switch part is connected with the positioning frame. The fan is detachably arranged on one side of the through hole, and the positioning frame and the blades are arranged on the other side of the through hole. The switch member is located on an installation path of the fan. In the first mode, any two adjacent blades overlap each other to close the through-hole. In the second mode, the fan pushes the switch piece to drive the positioning frame to drive the blades, so that the blades have the freedom of movement relative to the rotation of the positioning frame, or the blades rotate relative to the frame and open the through holes.

Description

Fan module and electronic device

Technical Field

The present disclosure relates to fan modules and electronic devices, and particularly to a fan module and an electronic device using the same.

Background

With the improvement of the computing efficiency and the increase of the computation load of the computer and the server, a large amount of heat is generated in the running process of the computer and the server. In order to rapidly discharge heat from the computer and the server, the computer and the server are mostly installed with a fan module to discharge hot air or to send external cold air into the computer and the server by operation of the fan module.

Currently, Hot-plugging (Hot-plugging) technology is widely applied to computers and servers, so as to facilitate people to perform actions such as installation, detachment, replacement, expansion or maintenance under the condition of no power failure. For the hot plug fan module, the shells of the computer and the server are provided with corresponding ventilation holes, so that the hot plug fan module can exhaust hot air in the shells of the computer and the server or send external cold air into the shells of the computer and the server. However, once the hot swap fan module stops operating or is removed from the chassis, the personnel must immediately close the vents, otherwise the airflow may flow back into the interior of the chassis of the computer and server.

Disclosure of Invention

The invention provides a fan module and an electronic device, which can prevent airflow from flowing backwards.

The invention provides a fan module which comprises a blade mechanism, a switch piece and a fan. The blade mechanism comprises a frame, a positioning frame and a plurality of blades, wherein the positioning frame is movably connected with the frame, and the blades are movably connected with the positioning frame and the frame. The frame has a through hole. The switch part is connected with the positioning frame. The fan is detachably arranged on one side of the through hole, and the positioning frame and the blades are arranged on the other side of the through hole. The switch member is located on an installation path of the fan. In the first mode, any two adjacent blades overlap each other to close the through-hole. In the second mode, the fan pushes the switch piece to drive the positioning frame to drive the blades, so that the blades have the freedom of movement relative to the rotation of the positioning frame, or the blades rotate relative to the frame and open the through holes.

The invention provides an electronic device, which comprises a casing and a fan module. The chassis has an installation space and a vent hole connected to the installation space. The fan module is detachably installed in the installation space. The fan module includes a blade mechanism, a switch member, and a fan. The blade mechanism comprises a frame, a positioning frame and a plurality of blades, wherein the positioning frame is movably connected with the frame, and the blades are movably connected with the positioning frame and the frame. The frame has a through hole to the ventilation hole. The switch part is connected with the positioning frame. The fan is detachably arranged on one side of the through hole, and the positioning frame and the blades are arranged on the other side of the through hole. The switch is located on the installation path of the fan, and the fan is detachably arranged between the vent hole and the through hole. In the first mode, any two adjacent blades overlap each other to close the through-hole. In the second mode, the fan pushes the switch piece to drive the positioning frame to drive the blades, so that the blades have the freedom of movement relative to the rotation of the positioning frame, or the blades rotate relative to the frame and open the through holes.

Based on the above, because the fan module and the electronic device of the present invention are integrated with the anti-backflow design, when the fan stops operating or the fan is removed from the casing, the path for the air flow to flow inside and outside in the casing can be immediately blocked, so as to prevent the air flow from flowing backwards and prevent external foreign objects from entering the inside of the casing.

In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 and fig. 2 are schematic diagrams of an electronic device according to an embodiment of the invention in two different modes.

FIG. 3 is a schematic view of the fan module of FIG. 1 in a first mode.

FIG. 4 is a schematic view of the fan module of FIG. 2 in a second mode.

Fig. 5 is an exploded schematic view of the vane mechanism of fig. 3.

FIG. 6 is a side schematic view of the fan module of FIG. 3.

Fig. 7 is a side schematic view of the fan module of fig. 4.

Fig. 8 is a rear view schematic diagram of the fan module of fig. 4.

Fig. 9 and 10 are schematic views of a fan module according to another embodiment of the present invention in two different modes.

FIG. 11 is a schematic top view of the vane mechanism of FIG. 9 in a first mode.

FIG. 12 is a schematic top view of the vane mechanism of FIG. 10 in a second mode.

Fig. 13 is a rear view schematic of the fan module of fig. 10.

The reference numbers are as follows:

10 electronic device

11: casing

11a installation space

11b vent hole

100. 100A fan module

101. 1011 installation path

110. 1101 blade mechanism

111. 1111: frame

111a, 1111a through hole

111b, 1111b mounting surface

111c, 1111c mounting groove

111d mounting hole

111e restricted area

111f active area

111g, 1111g, open pores

111h convex column

111i chute

1111j limiting hook

1111k guide groove

112. 1121 positioning frame

112a bump

1121b groove

1121c bottom surface

1121d penetrating groove

1121e recess

115. 1121f projection

113. 1131 blade

113a, 1131a blade body

113b, 1131b rotating shaft

113c snap projection

114. 1141 spring

1142 reset piece

1143 convex pin

120. 1201 switching device

130. 1301, a fan

D1 first direction

D2 second direction

D3 third Direction

Detailed Description

Fig. 1 and fig. 2 are schematic diagrams of an electronic device according to an embodiment of the invention in two different modes. Referring to fig. 1 and fig. 2, in the present embodiment, the electronic device 10 may be a notebook computer or a server, and the electronic device 10 includes a casing 11 and a fan module 100. The housing 11 may be a part of a housing of a notebook computer or a server, and the housing 11 has an installation space 11a and a vent hole 11b connecting the installation space 11 a. The number of the installation spaces 11a and the number of the ventilation holes 11b may be plural, and the number of the installation spaces 11a is equal to the number of the installation spaces 11 a.

The installation space 11a is used for accommodating the fan modules 100, wherein the fan modules 100 may be hot swap fan modules, but not limited thereto, and the number of the fan modules 100 can be adjusted according to actual requirements. When the fan module 100 is installed in the installation space 11a and operated, hot air inside the cabinet 11 may be discharged to the outside through the installation space 11a and the vent hole 11b, or cold air from the outside may be sent into the inside of the cabinet 11 through the vent hole 11b and the installation space 11 a. Since the fan module 100 is detachably installed in the installation space 11a, a person can move the whole or part of the fan module 100 away from the installation space 11a or install the whole or part of the fan module 100 in the installation space 11a according to actual needs.

FIG. 3 is a schematic view of the fan module of FIG. 1 in a first mode. FIG. 4 is a schematic view of the fan module of FIG. 2 in a second mode. Referring to fig. 1 to 4, in the present embodiment, the fan module 100 includes a blade mechanism 110, a switch 120 and a fan 130, wherein the blade mechanism 110 and the fan 130 are detachably mounted in the mounting space 11a, and the fan 130 is located between the ventilation hole 11b and the blade mechanism 110. Normally, the blade mechanism 110 is installed in the installation space 11a, and the fan 130 can be installed in the installation space 11a or moved out of the installation space 11a according to actual requirements.

The fan 130 may be an axial fan, and when the fan 130 stops operating or the fan 130 moves out of the installation space 11a, the blade mechanism 110 in the installation space 11a may instantly block a path for the air flow to flow in and out of the casing 11, so as to prevent the air flow from flowing backwards and prevent external foreign objects from entering the casing 11. For example, the ventilation hole 11b and the installation space 11a may constitute a part of a path for circulation of the air flow inside and outside the cabinet 11.

For example, the vane mechanism 110 may be switched between a closed mode and an open mode, the vane mechanism 110 in the closed mode blocking a path for the air flow to circulate between the inside and the outside of the housing 11, and the vane mechanism 110 in the open mode maintaining the path for the air flow to circulate between the inside and the outside of the housing 11 clear.

Fig. 5 is an exploded schematic view of the vane mechanism of fig. 3. Referring to fig. 3 to fig. 5, in the present embodiment, the blade mechanism 110 includes a frame 111, a positioning frame 112 and a plurality of blades 113, wherein the positioning frame 112 is movably connected to the frame 111, and the blades 113 are movably connected to the positioning frame 112 and the frame 111.

In detail, the positioning frame 112 is configured to slide relative to the frame 111 along the first direction D1, wherein the positioning frame 112 is a hollow structure, and the blades 113 are arranged on the positioning frame 112 along the first direction D1. Each blade 113 includes a blade body 113a and a rotating shaft 113b, and the rotating shafts 113b are pivotally connected to the positioning frame 112. Therefore, the blades 113 can slide with respect to the frame 111 along with the positioning frame 112, and the blade bodies 113a can rotate with respect to the positioning frame 112 through the rotation shafts 113 b. On the other hand, the frame 111 has a hollow structure and has a through hole 111a aligned with the vent hole 11 b. The fan 130 is detachably disposed at one side of the through hole 111a, and the positioning frame 112 and the blades 113 are disposed at the other side of the through hole 111 a.

Specifically, the rotation reference axis of the rotating shaft 113b is parallel to the second direction D2, and the first direction D1 is perpendicular to the second direction D2.

For example, the positioning frame 112 is provided with a protrusion 115 extending along the first direction D1, and a side of the frame 111 facing the positioning frame 112 is provided with a slide rail (not shown) corresponding to the protrusion 115, and the slide rail (not shown) extends along the first direction D1. Due to the matching of the convex portion 115 of the positioning frame 112 and the slide rail (not shown) of the frame 111, the positioning frame 112 can be easily installed to a fixed position by a person, or the stability of the positioning frame 112 sliding relative to the frame 111 can be improved.

As shown in fig. 1 and 3, in the first mode, the fan 130 is located outside the installation space 11a, and the blade mechanism 110 is in the closed mode. At this time, any two adjacent blade bodies 113a overlap each other to close the through-hole 111 a. Further, since any two adjacent blade bodies 113a overlap each other, the path of the external air flow flowing into the inside of the casing 11 through the through-hole 111a is blocked by these blade bodies 113 a.

In the present embodiment, the frame 111 further has a mounting surface 111b and a mounting groove 111c opposite to the mounting surface 111b, wherein the mounting surface 111b faces the ventilation hole 11b, and the mounting surface 111b is connected to the mounting groove 111c through the through hole 111 a. The fan 130 is detachably provided on the mounting surface 111b and detachably provided between the ventilation hole 11b and the through hole 111 a. In the first mode, the fan 130 is moved away from the mounting surface 111b and out between the ventilation holes 11b and the through holes 111 a.

FIG. 6 is a side schematic view of the fan module of FIG. 3. Fig. 7 is a side schematic view of the fan module of fig. 4. Fig. 8 is a rear view schematic diagram of the fan module of fig. 4. Referring to fig. 3 to 6, the positioning frame 112 and the blades 113 are disposed in the mounting groove 111c, and the frame 111 surrounds the positioning frame 112. Further, the rotating shafts 113b of the blades 113 are pivotally disposed on the side walls of the positioning frame 112, and penetrate through the side walls of the positioning frame 112 to connect the side walls of the frame 111. Further, the side wall of the frame 111 has a plurality of mounting holes 111D corresponding to the rotation shafts 113b, wherein the mounting holes 111D are arranged along the first direction D1, and the rotation shafts 113b are inserted into the mounting holes 111D.

In the present embodiment, each mounting hole 111d has a limiting region 111e and a movable region 111f connecting the limiting region 111e, and each rotating shaft 113b can slide with the positioning frame 112 relative to the frame 111 to move between the limiting region 111e and the movable region 111 f. In the first mode, the rotating shafts 113b of the blades 113 are located in the restricted areas 111e of the mounting holes 111d, and the restricted areas 111e of the mounting holes 111d generate structural interference with the rotating shafts 113b of the blades 113 to prevent the rotating shafts 113b of the blades 113 from rotating relative to the positioning frame 112. Accordingly, each blade body 113a is temporarily unable to rotate relative to the spacer 112 via the rotating shaft 113b, so that any two adjacent blade bodies 113a are maintained in a state of overlapping each other.

For example, each rotation shaft 113b has a protrusion 113c (as shown in fig. 5), and each restriction region 111e has a slot, and the shape of each protrusion 113c matches the shape of the corresponding restriction region 111 e. When each rotating shaft 113b is located in the limiting area 111e of the mounting hole 111d, the locking protrusion 113c is engaged with the locking groove and generates structural interference to prevent the rotating shaft 113b of each blade 113 from rotating relative to the positioning frame 112.

As shown in fig. 3, 5 and 6, the switch member 120 is connected to the positioning frame 112, wherein the switch member 120 is integrally formed on the positioning frame 112, and the switch member 120 is located on the installation path 101 of the fan 130. As shown in fig. 2, 4, 7 and 8, in the second mode, the fan 130 is installed in the installation space 11a, and the blade mechanism 110 is switched to the open mode. When the fan 130 is installed into the installation space 11a, the fan 130 pushes the switch member 120 to drive the positioning frame 112 to slide with respect to the frame 111. In the process, the blades 113 slide along the positioning frame 112 along the first direction D1 relative to the frame 111, and the rotating shaft 113b of each blade 113 moves from the limiting region 111e to the moving region 111 f.

As shown in fig. 4 and 7, after the rotating shaft 113b of each vane 113 moves from the restricted area 111e to the movable area 111f, the structural interference between the rotating shaft 113b of each vane 113 and the restricted area 111e is released, and the outer dimension (or outer diameter) of the rotating shaft 113b of each vane 113 is smaller than the inner dimension (or inner diameter) of the movable area 111 f. Therefore, the rotating shafts 113b moved to the moving areas 111f have freedom of movement to rotate relative to the positioning frame 112, and the blade bodies 113a can rotate relative to the positioning frame 112 through the rotating shafts 113 b.

As shown in fig. 2, 7 and 8, since the rotation shafts 113b have freedom of movement in rotation relative to the positioning frame 112, when the fan 130 is operated, the external cold air can be sent into the inside of the cabinet 11 through the installation space 11a, the ventilation holes 11b and the through holes 111 a. At this time, the airflow transmitted to the inside of the cabinet 11 pushes the blade bodies 113a, so that the blade bodies 113a rotate with respect to the positioning frame 112 to open the through holes 111 a. Further, after the blade bodies 113a rotate relative to the spacer 112, any two adjacent blade bodies 113a are separated from each other, and the path of the external air flow flowing into the interior of the casing 11 through the through hole 111a is no longer blocked by the blade bodies 113 a.

Once the fan 130 stops operating, the blade bodies 113a rotate back to the initial position by gravity. Finally, any two adjacent blade bodies 113a are overlapped with each other again to instantly close the through-hole 111 a.

As shown in fig. 3 and 5, in the present embodiment, the frame 111 further has an opening 111g located on the mounting surface 111b, wherein the opening 111g is further connected to the mounting groove 111c, and the switch element 120 passes through the opening 111g and protrudes from the mounting surface 111 b. As shown in fig. 2, 4 and 7, when the fan 130 is close to the mounting surface 111b and moves relative to the frame 111 to be mounted in the mounting space 11a, the fan 130 can make mechanical contact with the switch 120 and push the switch 120 to move toward the bottom surface of the mounting space 11 a. At the same time, the switch member 120 drives the positioning frame 112 to move toward the bottom surface of the installation space 11 a.

For example, the switch element 120 protrudes from the positioning frame 112 and extends outward along the third direction D3 to pass through the opening 111g and protrude from the mounting surface 111 b. Specifically, the first direction D1, the second direction D2, and the third direction D3 are perpendicular to each other.

As shown in fig. 6 to 8, the blade mechanism 110 further includes a spring 114, wherein the spring 114 can be a torsion spring, and the spring 114 is located in the mounting groove 111c, and two ends of the spring 114 respectively abut against the positioning frame 112 and the frame 111. For example, the sidewall of the positioning frame 112 has a protrusion 112a extending toward the frame 111, and the sidewall of the frame 111 has a protrusion 111h extending toward the positioning frame 112. The spring 114 is sleeved on the protruding pillar 111h, wherein one end of the spring 114 abuts against the protrusion 112a, and the other end of the spring 114 abuts against the bottom wall of the frame 111.

As shown in fig. 2 and 6 to 8, when the fan 130 is installed in the installation space 11a, the positioning frame 112 moves toward the bottom wall of the frame 111, and the spring 114 is pressed by the protrusion 112a to be elastically deformed. Once the fan 130 moves out of the installation space 11a, the elastic force of the spring 114 is applied to the protrusion 112a to drive the positioning frame 112 to move toward the top wall of the frame 111, and the rotating shaft 113b of each blade 113 moves from the movable region 111f to the restricted region 111 e. At this time, the restriction regions 111e of the mounting holes 111d generate structural interference with the rotation shafts 113b of the blades 113 to prevent the rotation shafts 113b of the blades 113 from rotating relative to the spacer 112.

As shown in fig. 5, the side wall of the frame 111 has a plurality of sliding slots 111i located in the mounting slot 111c, wherein the sliding slots 111i are arranged along the first direction D1, and the sliding slots 111i are connected to the mounting holes 111D. The extending direction of each sliding groove 111i is parallel to the third direction D3, and the rotating shafts 113b can be accurately mounted to the mounting holes 111D based on the guidance of the sliding grooves 111 i. During the process of installing the positioning frame 112 and the vanes 113 into the installation grooves 111c, the rotation shafts 113b slide to the installation holes 111D via the sliding grooves 111i in the third direction D3.

Other embodiments are listed below, and the same or similar design principles in each embodiment are not repeated, and are mainly explained for differences in each embodiment.

Fig. 9 and 10 are schematic views of a fan module according to another embodiment of the present invention in two different modes. FIG. 11 is a schematic top view of the vane mechanism of FIG. 9 in a first mode. FIG. 12 is a schematic top view of the vane mechanism of FIG. 10 in a second mode. Fig. 13 is a rear view schematic of the fan module of fig. 10. Referring to fig. 9 and 10, the fan module 100A of the present embodiment can be applied to the housing 11 shown in fig. 1 and 2, and the blade mechanism 1101 of the fan module 100A is different from the blade mechanism 110 of the fan module 100 of the previous embodiment.

Referring to fig. 9 to 12, in the present embodiment, the blades 1131 of the blade mechanism 1101 are arranged on the frame 1111 along the second direction D2, wherein the rotating shafts 1131b of the blades 1131 are pivoted to the frame 1111, and the rotation reference axis of each rotating shaft 1131b is parallel to the first direction D1. On the other hand, the positioning frame 1121 is closer to the through hole 1111a than the vanes 1131, wherein the positioning frame 1121 is slidably disposed on the inner side of the top wall of the frame 1111, and the positioning frame 1121 has freedom of movement along the second direction D2 and the third direction D3 relative to the frame 1111.

The positioning frame 1121 has a groove 1121b facing the frame 1111, and a part of the switch member 1201 is located in the groove 1121b and slidably abuts against a bottom surface 1121c of the groove 1121 b. Further, the pair of grooves 1121b are located at the opening 1111g, wherein the first end of the switch member 1201 is located in the groove 1121b and slidably abuts against the positioning frame 1121. The second end of the switch member 1201 passes through the opening 1111g, wherein the second end of the switch member 1201 protrudes from the mounting surface 1111b and is located on the mounting path 1011 of the fan 1301.

For example, the first end of the switch element 1201 may be designed to have a curved surface, an arc surface, or an inclined surface, so as to smoothly push the positioning frame 1121. On the other hand, the second end of the switch member 1201 can adopt a curved surface, an arc surface or an inclined surface, so as to be smoothly pushed by the fan 1301, and the fan 1301 smoothly moves through the position of the switch member 1201, thereby avoiding the situation that the fan 1301 is stuck by the switch member 1201.

In this embodiment, the bottom surface 1121c of the groove 1121b includes a slope section, and the first end of the switch member 1201 slidably abuts the slope section. Further, the normal direction of the inclined plane segment is not parallel to the second direction D2 and the third direction D3, and when the switch element 1201 moves along the third direction D3 and pushes the inclined plane segment through the first end, the positioning frame 1121 is driven and slides relative to the frame 1111 along the direction parallel to the normal direction of the inclined plane segment. As shown in fig. 13, the positioning bracket 1121 also has a through slot 1121d facing the frame 1111, and the frame 1111 also has a limit catch 1111j protruding into the mounting slot 1111 c. The limiting hook 1111j penetrates through the through slot 1121d to prevent the positioning bracket 1121 from being separated from the frame 1111.

In the first mode, any two adjacent blade bodies 1131a overlap each other to close the through hole 1111 a. Further, since any two adjacent vane bodies 1131a overlap each other, a path of the external air flow flowing into the inside of the cabinet through the through hole 1111a is blocked by these vane bodies 1131 a.

Referring to fig. 11, in the present embodiment, the positioning frame 1121 includes a plurality of recesses 1121e and a plurality of protrusions 1121f, wherein the recesses 1121e and the protrusions 1121f are arranged in a staggered manner, and the recesses 1121e and the protrusions 1121f face the blades 1131. In the recesses 1121e and the projections 1121f arranged in a staggered manner, any two adjacent projections 1121f are separated by one recess 1121e, or any two adjacent recesses 1121e are separated by one projection 1121 f.

The pairs of the shafts 1131b of the vanes 1131 are located in the recesses 1121e, and in the first mode, the shafts 1131b are located outside the recesses 1121 e. On the other hand, the protrusions 1121f abut the vane bodies 1131a, or the vane bodies 1131a are located on the moving path of the protrusions 1121 f.

Referring to fig. 11 to 13, in the second mode, the fan 1301 pushes the switch 1201 to drive the positioning frame 1121 to move toward the blades 1131 and push the blade bodies 1131a through the protrusions 1121f, so that the blade bodies 1131a rotate relative to the frame 1111 and open the through holes 1111a, and the rotating shafts 1131b are received in the recesses 1121 e. Further, after the blade bodies 1131a are pushed by the protrusions 1121f to rotate relative to the frame 1111, any two adjacent blade bodies 1131a are separated from each other, and a path of an external air flow flowing into the interior of the cabinet through the through hole 1111a is no longer blocked by the blade bodies 1131a, or a path of a hot air discharged from the interior of the cabinet to the outside through the through hole 1111a is no longer blocked by the blade bodies 1131 a.

In the second mode, each blade body 1131a is pushed by the protrusion 1121f, and each rotating shaft 1131b is located in the recess 1121e, so that a state that any two adjacent blade bodies 1131a are separated from each other can be maintained.

In this embodiment, the blade mechanism 1101 further includes a spring 1141 and a reset member 1142, wherein the spring 1141 and the reset member 1142 are disposed in the mounting groove 1111c, and two ends of the spring 1141 respectively abut against the side wall of the frame 1111 and the reset member 1142. The spring 1141 may be a compression spring, and the reset member 1142 abuts one of the vane bodies 1131a to ensure that the vane bodies 1131a are maintained in a state of overlapping each other.

When the blade bodies 1131a rotate with respect to the frame 1111 to separate any two adjacent blade bodies 1131a from each other, the blade body 1131a abutting against the reset member 1142 pushes the reset member 1142, so that the reset member 1142 slides in the second direction D2. At this time, the spring 1141 is pressed by the reset member 1142 to be elastically deformed.

Once the fan 1301 moves away from the blade mechanism 1101, the elastic force of the spring 1141 is applied to the reset member 1142 to slide the reset member 1142 back to the initial position. At this time, the blade body 1131a abutting against the reset member 1142 is pushed by the reset member 1142 to rotate relative to the frame 1111 and rotate back to the initial position. Meanwhile, the blade body 1131a abutting against the reset member 1142 drives the other blade body 1131a to rotate relative to the frame 1111, so that the other blade body 1131a rotates back to the initial position. Finally, any two adjacent blade bodies 1131a overlap each other again to instantly close the through hole 1111 a.

For example, one of any two adjacent blade bodies 1131a (hereinafter referred to as a first blade body) is located on a rotation path of the other of any two adjacent blade bodies 1131a (hereinafter referred to as a second blade body), and when the second blade body rotates back to the initial position, the second blade body may make mechanical contact with the first blade body and drive the first blade body to rotate back to the initial position.

Specifically, the top wall and the bottom wall of the frame 1111 have a guide groove 1111k, wherein the guide groove 1111k extends in a direction parallel to the second direction D2. On the other hand, the reset element 1142 has a protruding pin 1143, and the protruding pin 1143 is slidably disposed in the guiding groove 1111k to determine the sliding direction of the reset element 1142.

In summary, since the fan module and the electronic device of the present invention are integrated with the anti-backflow structure, when the fan stops operating or the fan is removed from the housing, the blade mechanism can immediately block the path for the air flow to flow inside and outside the housing, so as to prevent the air flow from flowing backwards and prevent the external foreign objects from entering the interior of the housing.

Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.

Claims

1. A fan module, comprising:

the blade mechanism comprises a frame, a positioning frame and a plurality of blades, wherein the positioning frame is movably connected with the frame, the blades are movably connected with the positioning frame and the frame, and the frame is provided with a through hole;

the switch piece is connected with the positioning frame; and

the fan is detachably arranged on one side of the through hole, the positioning frame and the blades are positioned on the other side of the through hole, the switch piece is positioned on the installation path of the fan,

in the first mode, any two adjacent blades of the plurality of blades overlap each other to close the through hole,

in a second mode, the fan pushes the switch to drive the positioning frame to drive the plurality of blades, so that the plurality of blades have freedom of movement relative to the rotation of the positioning frame, or the plurality of blades rotate relative to the frame and open the through hole.

2. The fan module of claim 1, wherein the frame further has a mounting surface and a mounting groove opposite to the mounting surface, the mounting surface is connected to the mounting groove through the through hole, the fan is detachably disposed on the mounting surface, and the spacer and the plurality of blades are disposed in the mounting groove.

3. The fan module of claim 2, wherein the frame further has an opening on the mounting surface, and the switch member passes through the opening and protrudes from the mounting surface.

4. The fan module as claimed in claim 1, wherein each of the blades includes a blade body and a shaft, and the shafts of the blades are pivotally connected to the positioning frame, and in the first mode, any two adjacent blades of the blades overlap each other to close the through hole.

5. The fan module as claimed in claim 4, wherein a plurality of the rotation shafts of a plurality of the blades penetrate the spacer, and the frame further has a plurality of mounting holes corresponding to the plurality of the rotation shafts, the plurality of the rotation shafts of a plurality of the blades are inserted into the plurality of the mounting holes, and each of the mounting holes has a restriction area and an active area,

in a first mode, the plurality of rotation axes of the plurality of blades are located in the plurality of restricted areas of the plurality of mounting holes, the plurality of restricted areas of the plurality of mounting holes and the plurality of rotation axes of the plurality of blades generate structural interference to prevent the plurality of rotation axes of the plurality of blades from rotating relative to the positioning frame,

in a second mode, the fan pushes the switch to drive the positioning frame to drive the plurality of blades, so that the rotating shafts of the plurality of blades move to the moving areas of the mounting holes, and the rotating shafts of the plurality of blades have a degree of freedom of movement relative to the positioning frame.

6. The fan module of claim 4, wherein the blade mechanism further comprises a spring, and both ends of the spring abut against the positioning frame and the frame, respectively.

7. The fan module as claimed in claim 1, wherein each of the blades includes a blade body and a shaft, and the shafts of the plurality of blades are pivotally connected to the frame, and any two adjacent blades of the plurality of blade bodies overlap each other to close the through hole in the first mode.

8. The fan module as claimed in claim 7, wherein the positioning frame comprises a plurality of concave portions and a plurality of convex portions, the plurality of concave portions and the plurality of convex portions are arranged in a staggered manner, the plurality of concave portions and the plurality of convex portions face the plurality of blades, the plurality of pivot pairs of the plurality of blades are located in the plurality of concave portions, in the second mode, the fan pushes the switch member to drive the positioning frame to move towards the plurality of blades and push the plurality of blade bodies through the plurality of convex portions, so that the plurality of blade bodies rotate relative to the frame and open the through hole, and the plurality of pivot pairs of the plurality of blades are received in the plurality of concave portions.

9. The fan module of claim 7, wherein the retainer has a recess facing the frame, and a portion of the switch member is disposed in the recess and slidably abuts a bottom surface of the recess.

10. The fan module of claim 7, wherein the blade mechanism further comprises a spring and a reset member, wherein two ends of the spring respectively abut against the frame and the reset member, and the reset member abuts against one of the plurality of blade bodies.

11. An electronic device, comprising:

a housing having an installation space and a vent hole connected to the installation space; and

a fan module detachably installed in the installation space, the fan module including:

the blade mechanism comprises a frame, a positioning frame and a plurality of blades, wherein the positioning frame is movably connected with the frame, the blades are movably connected with the positioning frame and the frame, and the frame is provided with a through hole opposite to the through hole;

the switch piece is connected with the positioning frame; and

a fan detachably disposed at one side of the through hole, the positioning frame and the plurality of blades are disposed at the other side of the through hole, the switch part is disposed on an installation path of the fan, and the fan is detachably disposed between the vent hole and the through hole,

12. The electronic device as claimed in claim 11, wherein the frame further has a mounting surface and a mounting groove opposite to the mounting surface, the mounting surface is connected to the mounting groove through the through hole, the fan is detachably disposed on the mounting surface, and the positioning frame and the plurality of blades are disposed in the mounting groove.

13. The electronic device of claim 12, wherein the frame further has an opening on the mounting surface, and the switch member passes through the opening and protrudes from the mounting surface.

14. The electronic device as claimed in claim 11, wherein each blade includes a blade body and a rotating shaft, and the rotating shafts of the plurality of blades are pivotally connected to the positioning frame, and in the first mode, any two adjacent blade bodies of the plurality of blade bodies overlap each other to close the through hole.

15. The electronic device of claim 14, wherein a plurality of the rotation shafts of a plurality of the blades extend out of the positioning frame, and the frame further has a plurality of mounting holes corresponding to the plurality of the rotation shafts, the plurality of the rotation shafts of a plurality of the blades are inserted into the plurality of the mounting holes, and each of the mounting holes has a restriction area and an active area,

16. The electronic device of claim 14, wherein the blade mechanism further comprises a spring, and two ends of the spring abut against the positioning frame and the frame, respectively.

17. The electronic device as claimed in claim 11, wherein each blade includes a blade body and a rotating shaft, and the rotating shafts of the plurality of blades are pivotally connected to the frame, and in the first mode, any two adjacent blade bodies of the plurality of blade bodies overlap each other to close the through hole.

18. The electronic device of claim 17, wherein the positioning frame comprises a plurality of concave portions and a plurality of convex portions, the plurality of concave portions and the plurality of convex portions are arranged in a staggered manner, the plurality of concave portions and the plurality of convex portions face the plurality of blades, the plurality of pivot pairs of the plurality of blades are located in the plurality of concave portions, in the second mode, the fan pushes the switch to drive the positioning frame to move towards the plurality of blades and push the plurality of blade bodies through the plurality of convex portions, so that the plurality of blade bodies rotate relative to the frame and open the through hole, and the plurality of pivot pairs of the plurality of blades are received in the plurality of concave portions.

19. The electronic device of claim 17, wherein the positioning frame has a groove facing the frame, and a portion of the switch member is located in the groove and slidably abuts against a bottom surface of the groove.

20. The electronic device of claim 17, wherein the blade mechanism further comprises a spring and a reset member, two ends of the spring respectively abut against the frame and the reset member, and the reset member abuts against one of the plurality of blade bodies.